Vieira, LC;
Ozan, W;
Mitchell, J;
Darwazeh, I;
(2022)
Modeling and compensation of nonlinear distortion in direct-detection optical Fast-OFDM systems.
In:
Proceedings of the 2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP).
(pp. pp. 168-173).
IEEE: Porto, Portugal.
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Abstract
Fast-OFDM based intensity-modulation and direct-detection (IM/DD) has been proposed for the deployment of cost-efficient optical access networks, due to simple implementation and high spectral efficiency. In this work, the generalized memory polynomial (GMP) is firstly applied to model the nonlinear characteristic of IM/DD Fast-OFDM links, including memory effects. After model validation using measured data of a 10 km single mode fiber link, the GMP is used for performance investigations of a combined clipping and digital post-distortion approach to optical Fast-OFDM, considering both 4PAM and 8PAM modulation formats and different number of Fast-OFDM subcarriers. This work firstly reports performance results of optical 8PAM-Fast-OFDM systems using 2PAM-based training signals for digital post-distortion and FFT-based channel estimation. Excellent performance improvements are achieved using the proposed distortion compensation scheme, relative to conventional system implementation.
| Type: | Proceedings paper |
|---|---|
| Title: | Modeling and compensation of nonlinear distortion in direct-detection optical Fast-OFDM systems |
| Event: | 2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) |
| Dates: | 20 Jul 2022 - 22 Jul 2022 |
| ISBN-13: | 978-1-6654-1044-1 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/CSNDSP54353.2022.9908043 |
| Publisher version: | https://doi.org/10.1109/CSNDSP54353.2022.9908043 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Fast-OFDM, IM/DD systems, nonlinear modeling, distortion compensation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10159062 |
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